SurfaceMap › d › dfn.de

dfn.de

Checked 2026-10-21 22:14 UTC · first added 2026-10-21
✗Problems found Score 81 of 100

Domain & DNS

ok

27 passed 0 warn 0 failed

Areas

iRegistration iDelegation ✓Nameservers ✓SOA iDNSSEC iRecords

Recent checks

✓

Full report

Domain & DNS report for dfn.de ›

Mail

fail

25 passed 3 warn 1 failed

Areas

✓SPF ✗DMARC ✓DKIM ✓DNSSEC ✓MX !TLS iBIMI

Problems

  • ✗
    Policy: none (monitoring only)
    DMARC · DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • !
    No aggregate reports (rua)
    DMARC · DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...
    #19
  • !
    Not configured
    TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.
    #32
  • !
    Not configured
    TLS · MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".
    #35

Recent checks

✗

Full report

Mail report for dfn.de ›